ABB S203UP-K20 Miniature Circuit Breaker
- 20A
- 3 Pole
- DIN Rail
Quantity
ABB S203UP-K20 - 20A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
The S200UP series delivers reliable UL 489 branch circuit protection for industrial environments. Built for motor control, this 20A, three-pole breaker utilizes a K-curve trip to prevent nuisance tripping during high inrush currents. It installs onto standard DIN rail enclosures. This legacy model has been replaced by the SU203M-K20, making it an ideal exact-match replacement for existing setups. Rated at 10kAIC for 480Y/277VAC, it features current-limiting technology and finger-safe terminals.Specifications
| Brand | ABB |
|---|---|
| Series | S200UP |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | DIN Rail |
| Voltage | 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 480Y/277VAC |
| Frame Type | S203 |
|---|---|
| Terminal Type | Screw/Clamp Terminal |
| For Use With | DIN Rail Enclosures, Control Panels |
| Wire Gauge | 18-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 18 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Curve | K |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Bell Alarm, Padlock Attachment, Busbar System, Motor Operator, Terminal Shields |
|---|---|
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL, VDE |
| Temp Rating | -25C to 55C |
| Construction Features | Current Limiting, Reverse Feed, Common Trip |
Product FAQs
6 answersWhat does the K trip curve indicate on the S203UP-K20?
The K trip curve is designed for loads with high inrush currents, such as motors and transformers. It allows the breaker to ride through momentary current spikes without nuisance tripping, typically interrupting short circuits at 8 to 12 times the rated current.
Is the ABB S203UP-K20 rated for branch circuit protection?
Yes, the S200UP series is UL 489 listed, making it suitable for branch circuit protection in control panels and electrical enclosures.
Can the S203UP-K20 miniature circuit breaker be reverse fed?
Yes, ABB S200UP series miniature circuit breakers feature a feed-thru connection design that is suitable for reverse feed applications.
What is the current replacement series for the S203UP-K20?
ABB has transitioned the S200UP series to the SU200M series. The direct replacement catalog number for this breaker is the SU203M-K20.
What type of mounting rail is required for the S203UP-K20?
This miniature circuit breaker is designed to mount on a standard 35mm DIN rail.
Are field-installable accessories available for the S203UP-K20?
Yes, this breaker is compatible with ABB System pro M compact accessories, including auxiliary contacts, shunt trips, and UL 508 listed busbars.
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